Solve for x
x=20
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20+x=4x-40
Use the distributive property to multiply 4 by x-10.
20+x-4x=-40
Subtract 4x from both sides.
20-3x=-40
Combine x and -4x to get -3x.
-3x=-40-20
Subtract 20 from both sides.
-3x=-60
Subtract 20 from -40 to get -60.
x=\frac{-60}{-3}
Divide both sides by -3.
x=20
Divide -60 by -3 to get 20.
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